MAC address lookup
Enter a MAC address to find which manufacturer made the network interface, using the IEEE's public registry of assigned prefixes (refreshed monthly). Useful for identifying unknown devices on your Wi-Fi — and for understanding why your phone's address keeps changing.
Paste a MAC address above or pick an example. Only the registry chunk for that prefix is downloaded.
Look up a MAC address
Paste a MAC address in any common format (02:00:5E:10:00:01, 02-00-5E-10-00-01, 0200.5E10.0001); only the first part is used for the vendor lookup, and nothing is stored. Several addresses, one per line, are looked up together.
Vendor details
The result shows the registered organization, its address block and the block size.
OUI, MA-M and MA-S
The IEEE sells prefixes in three sizes: a 24-bit OUI (MA-L, 16 million addresses per block), a 28-bit MA-M (1 million) and a 36-bit MA-S (4,096). The lookup checks all three registries, longest match first, which is why some addresses resolve to a small company rather than the chip maker.
Locally administered bit
The second-least-significant bit of the first byte (x2, x6, xA, xE as the second hex digit) marks an address that was set by software, not assigned by a manufacturer. No vendor lookup applies; it is almost always a randomized address (below) or a virtual machine.
Randomized / private MAC addresses
Since iOS 14, Android 10 and Windows 10, devices use a different random MAC address for each Wi-Fi network by default, so that networks cannot track a device across locations. The random address has the locally administered bit set and no vendor; your router's device list shows it instead of the real hardware address, and MAC-based filters or reservations need the per-network address. The hardware address is still used for Ethernet and shown in the device settings.
How to find your MAC address
Each system shows it in the network details; Wi-Fi and Ethernet have different addresses.
Windows
ipconfig /all in a terminal, the Physical Address line under the adapter; or Settings › Network & internet › the connection › Physical address (MAC).
macOS
System Settings › Network › the connection › Details › Hardware; or ifconfig en0 | grep ether in Terminal.
iPhone
Settings › General › About › Wi-Fi Address (the hardware address). The per-network random address is under Settings › Wi-Fi › ⓘ › Private Wi-Fi Address.
Android
Settings › About phone › Status › Wi-Fi MAC address (hardware); the per-network randomized address is in the Wi-Fi network's details.
Frequently asked questions
What is a MAC address?
The 48-bit hardware identifier of a network interface, written as six pairs of hexadecimal digits, assigned by the manufacturer from a block it bought from the IEEE. It is used to deliver frames on the local network and never leaves it.
Can you give me an example of a MAC address?
02:00:5E:10:00:01 — six pairs of hexadecimal digits. In a manufacturer-assigned address the first three pairs identify the maker and the last three the individual interface; this example has the locally administered bit set, so it belongs to no vendor.
Can a MAC address be hacked?
A MAC address cannot be hacked by itself; it can be spoofed (any software can set one) and it can be used to track a device across Wi-Fi networks, which is why phones now randomize it. It is not visible to websites, only to the local network.
What is MAC address filtering?
A router feature that allows or blocks devices by MAC address. It stops casual connections but not anyone who can see the address and set their own to match; use WPA3 and a strong password instead, and treat filtering as convenience, not security.
What does ff:ff:ff:ff:ff:ff mean?
The broadcast address: a frame sent to ff:ff:ff:ff:ff:ff is delivered to every device on the local network, used by ARP and DHCP discovery.
Is your Wi-Fi address the same as your MAC address?
On iPhones, Wi-Fi Address in Settings is the hardware MAC address of the Wi-Fi interface; the Private Wi-Fi Address per network is the randomized one that networks actually see.
How do I get my MAC address using the Command Prompt?
ipconfig /all lists every adapter with its Physical Address; getmac prints only the addresses.
Data: IEEE Registration Authority public listings (MA-L, MA-M, MA-S, IAB and CID; 59,053 assignments), downloaded on 2026-10-21 and bundled into this site; the lookup runs in your browser. Address bits follow IEEE 802-2014 and 802c-2017.